10-07-2018, 03:07 AM
Many of the older North American FM sets have had a cap added to the output circuitry that really impedes the bass response, makes them sound almost muddy, but if you remove it they really liven up. I'm not sure if the 1959 and later brand Zs have this or not since they were aiming for a Hi-Fi market.
Regards
Arran
Regards
Arran